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Same build as SD but greater capacity and transfer speed, 4 GB to 32 GB (not compatible with older host devices). miniSDHC: 2008 32 GB [4] Same build as miniSD but greater capacity and transfer speed, 4 GB to 32 GB. 8 GB is largest in early-2011 (not compatible with older host devices). microSDHC: 2007 32 GB [4]
The basis for memory card technology is flash memory. [2] It was invented by Fujio Masuoka at Toshiba in 1980 [3] [4] and commercialized by Toshiba in 1987. [5] [6] The development of memory cards was driven in the 1980s by the need for an alternative to floppy disk drives that had lower power consumption, had less weight and occupied less ...
An Eye-Fi card for sale in Tokyo, February 2010 A disassembled 16 GB Eye-Fi card 4 GB Eye-Fi card in a CompactFlash adapter. Eye-Fi was a company based in Mountain View, California, that produced SD memory cards with Wi-Fi capabilities.
Original PC Card memory cards used an internal battery to maintain data when power was removed. The rated life of the battery was the only reliability issue. CompactFlash cards that use flash memory, like other flash-memory devices, are rated for a limited number of erase/write cycles for any "block."
The Memory Stick Micro (M2) measures 15 × 12.5 × 1.2 mm (roughly one-quarter the size of the Duo) with 64 MB, 128 MB, 256 MB, 512 MB, 1 GB, 2 GB, 4 GB, 8 GB, and 16 GB capacities available. The format has a theoretical limit of 32 GB and maximum transfer speed of 160 Mbit/s.
This was followed by a 6 GB capacity model in February 2005 for a price of $299, with the 4 GB model dropping to $199. [ 18 ] [ 19 ] Hitachi additionally planned an even smaller 1-inch hard drive with a capacity of 8-10 GB under the code-name "Mikey" for late 2005 with a weight of 14 grams and a size of 40 mm × 30 mm × 5 mm. [ 20 ] [ 21 ]